A color icon representing the object of his search marked its last known coordinates near the deep, craggy notch at the pass's junction with Wright Valley.

True to his prediction, the pass's terrain changed radically toward its juncture with Wright Valley.

And the approach from Wright Valley on foot is full of obstacles.

"We'll swing around the notch, dip into Wright Valley just to its south."

Don Juan Pond in Wright Valley is fed by groundwater from a rock glacier and remains unfrozen throughout the year.

It flows part way down the north wall of the range toward Wright Valley.

Wright Valley was awesome.

A hanging glacier, it terminates on the north wall of Wright Valley.

The pass permits walking access to Wright Valley from McKelvey Valley.

Lake Vanda, also in Wright Valley, is a highly-stratified lake some 5 km 2 in area and up to 70 m deep.

A color icon representing the object of his search marked its last known coordinates near the deep, craggy notch at the pass's junction with Wright Valley.

True to his prediction, the pass's terrain changed radically toward its juncture with Wright Valley.

And the approach from Wright Valley on foot is full of obstacles.

"We'll swing around the notch, dip into Wright Valley just to its south."

Don Juan Pond in Wright Valley is fed by groundwater from a rock glacier and remains unfrozen throughout the year.

It flows part way down the north wall of the range toward Wright Valley.

Wright Valley was awesome.

A hanging glacier, it terminates on the north wall of Wright Valley.

The pass permits walking access to Wright Valley from McKelvey Valley.

Lake Vanda, also in Wright Valley, is a highly-stratified lake some 5 km 2 in area and up to 70 m deep.